ALERT
Best For
The Sennheiser HD 558 and Koss PRO-4AA are both wired over-ear headphones aimed at serious listeners, but they serve very different listening needs. The HD 558 focuses on an open-back design that delivers a wide, natural soundstage and smooth tuning, making it ideal for music lovers and immersive listening. On the other hand, the PRO-4AA is built for studio-style monitoring with strong isolation and a more analytical sound profile. With differences in impedance, comfort design, and sound presentation, both appeal to distinct user types depending on whether you prefer relaxed audiophile listening or controlled studio accuracy.
Verdict
The Sennheiser HD 558 is the better all-round choice for most users due to its wider soundstage, easier drivability, and more comfortable long-session listening. It suits music, movies, and casual gaming extremely well. The Koss PRO-4AA is more suited for studio monitoring, recording environments, and users who prefer a tighter, more isolated sound. If you want natural audio and comfort, go with HD 558. If isolation and professional usage matter more, PRO-4AA is the niche pick.
| Specification | ||
|---|---|---|
| Price | Rs.12,314.00 |
Rs.12,500.00 |
| Brand | Koss |
Sennheiser |
| Model No | PRO-4AA |
HD 558 |
| Wired / Wireless | Wired Headphone Specification |
Wired Headphone Specification |
| Headphone Type | Over Ear |
Over Ear |
| Magnet Type | Neodymium |
Neodymium |
| Driver Diameter | NA |
NA |
| Impedance | 250 Ohms |
50 Ohms |
| Sensitivity | 95 dB/mW |
112 dB/mW |
| Frequency Response | 10 Hz - 25000 Hz |
15 Hz - 28,000Hz |
| Maximum Power Input | NA |
NA |
| Noise Cancelling | NA |
NA |
| Available Colors | Yellow |
Black, Brown |
| Connector Plating | 3.5 mm Gold Plated Jack |
3.5 mm Gold Plated Plug |
| Cable | 2.5 m |
3 m |
| Weight | NA |
270 g |
| Other Features | - Noise isolating professional studio headphones - The first dynamic headphones to deliver true full frequency, high fidelity performance - Standard-setting design incorporates performance-enhancing technology - Superior isolation, accurate sound reproduction and the excitement of a live performance with every recording - Durable steel and generously padded rubber headband - Adjustable slide bars ensure snug fit - 8 foot coiled cord with 6.3 mm (1/4") plug - Covered under the Koss Stereo phones Limited Lifetime Warranty |
- High-end open circumaural headphones with E.A.R. technology for outstanding bass and vocal projection - Sennheiser's innovative "Eargonomic Acoustic Refinement" (E.A.R.) design channels audio signals directly into your ears - State-of-the-art, advanced Duofol diaphragms for transparency and minimal distortion - Highly optimised, field-strengthened neodymium ferrous magnet systems for an excellent dynamic response - Surround reflector for extended spatial sound field - Lightweight aluminium voice coils for high efficiency and excellent dynamics - Elegantly layered honeycomb finish on ear cup casings - Extremely comfortable velour ear pads and headband - Excellent connectivity, also with home Hifi equipment - 2-year warranty |
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Frequently Asked Questions
Top Differences
- Weight: 270 g vs NA
- Impedance: 50 Ohms Vs 250 Ohms